I don't know if anyone has already suggested it but I did not find anything on the forum. Cathcart circle with its "bus route" nature seems to perfectly suit the new conductor mode. Both class 314 and 380 have guard panels, so implementing would not be a very difficult thing. DTG have said that they would look into older routes and some could get this feature.
The Strathclyde region has been Driver Only Operated for many years. The only conductor mode on Cathcart Circle would be ticket inspection.
Conductors on ScotRail trains (in the Glasgow area) don't operate doors, haven't done for as long as I can remember.
I know at least some of the ones on 170 services in Edinburgh do, so maybe if we get Waverley-Tweedbank sometime
